musl-libc support

[nightah]

Thanks for this fantastic project! I had a little play around on my primary driver which is Arch Linux and glibc, everything worked great.

I have just attempted to build osxcross on an Alpine Linux based container and ran in to issues.

The build fails with the following error:

sed -e s/@LIBXAR_SNAME@/libxar.so.1/ -e s/@LIBXAR_LNAME@/libxar.so/ -e s/@LIBXAR_ANAME@/libxar.a/ < lib/libxar.la.in > lib/libxar.la
src/xar.c:40:10: fatal error: 'fts.h' file not found
#include <fts.h>
         ^~~~~~~
clang -shared -Wl,-soname,libxar.so.1 -o lib/librxar.so.1 lib/archive.o lib/arcmod.o lib/b64.o lib/bzxar.o lib/darwinattr.o lib/data.o lib/ea.o lib/err.o lib/ext2.o lib/fbsdattr.o lib/filetree.o lib/io.o lib/lzmaxar.o lib/linuxattr.o lib/hash.o lib/signature.o lib/stat.o lib/subdoc.o lib/util.o lib/zxar.o lib/script.o lib/macho.o -Llib  -llzma -lz -lcrypto  -lxml2 -L/lib -lz -llzma -lm
clang -shared -Wl,-soname,libxar.so.1 -o lib/libxar.so.1 lib/archive.o lib/arcmod.o lib/b64.o lib/bzxar.o lib/darwinattr.o lib/data.o lib/ea.o lib/err.o lib/ext2.o lib/fbsdattr.o lib/filetree.o lib/io.o lib/lzmaxar.o lib/linuxattr.o lib/hash.o lib/signature.o lib/stat.o lib/subdoc.o lib/util.o lib/zxar.o lib/script.o lib/macho.o -Llib  -llzma -lz -lcrypto  -lxml2 -L/lib -lz -llzma -lm
1 error generated.
make: *** [src/Makefile.inc:66: src/xar.o] Error 1
make: *** Waiting for unfinished jobs....
rm -f lib/libxar.so
rm -f lib/librxar.so
ln -s libxar.so.1 lib/libxar.so
ln -s librxar.so.1 lib/librxar.so

exiting with abnormal exit code (2)
run 'OCDEBUG=1 ./build.sh' to enable debug messages

The above error is related to this.
I have also attempted to install fts-dev and that results in the following error:

/usr/bin/ranlib lib/libxar.a
clang -w  -o src/xar src/xar.o -Wl,-rpath,/build/build/xar/xar/lib -Llib  lib/libxar.a -llzma -lz -lcrypto  -lxml2 -L/lib -lz -llzma -lm
clang -w  -o src/ixar src/xar.o -Wl,-rpath,/build/target/lib -Llib  lib/libxar.so.1 -llzma -lz -lcrypto  -lxml2 -L/lib -lz -llzma -lm
/usr/bin/ld: src/xar.o: in function `archive':
xar.c:(.text+0x3f2b): undefined reference to `fts_open'
/usr/bin/ld: xar.c:(.text+0x3f70): undefined reference to `fts_read'
/usr/bin/ld: xar.c:(.text+0x417d): undefined reference to `fts_close'
clang-9: error: linker command failed with exit code 1 (use -v to see invocation)
/usr/bin/ld: src/xar.o: in function `archive':
xar.c:(.text+0x3f2b): undefined reference to `fts_open'
/usr/bin/ld: xar.c:(.text+0x3f70): undefined reference to `fts_read'
/usr/bin/ld: xar.c:(.text+0x417d): undefined reference to `fts_close'
make: *** [src/Makefile.inc:58: src/ixar] Error 1
make: *** Waiting for unfinished jobs....
clang-9: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [src/Makefile.inc:42: src/xar] Error 1

exiting with abnormal exit code (2)
run 'OCDEBUG=1 ./build.sh' to enable debug messages

You can follow these steps with Docker to replicate the environment and error:

1. cd to /path/of/osxbuild
2. Ensure that the packaged SDK is in the tarballs/ directory
3. docker run --rm -it --entrypoint /bin/ash -v $PWD:/build alpine
4. apk add --no-cache bash clang cmake gcc git libxml2-dev make musl-dev openssl-dev patch python3
5. cd /build && ./build.sh
   This will allow you to replicate the first error
6. apk add --no-cache fts-dev
7. ./build.sh
   This will allow you to replicate the second error

I'm not entirely certain what the stance is on musl-libc, any help would be appreciated and if there's anything I can do to help debug/support please let me know.

[tpoechtrager]

Fixed. Thanks for the detailed report.

You will also need g++ and clang-dev to make OSXCross build.

[nightah]

Great, thanks for the prompt fix and response. I’ll give it a whirl in a couple hours.

[nightah]

@tpoechtrager on the back of this I was able to get OSXCross built, however, it looks like I'm having trouble building the cross-compiler with gcc.

I had to add a couple extra packages per the warnings:

apk add --no-cache gmp-dev mpfr-dev mpc1-dev

But it seems to result in the following error:

/build/target/bin/x86_64-apple-darwin19-ranlib: archive member: libgcov.a(_gcov_merge_add.o) size too large (archive member extends past the end of the file)
x86_64-apple-darwin19-ar: internal ranlib command failed
/build/build/gcc-9.2.0/build/./gcc/xgcc -B/build/build/gcc-9.2.0/build/./gcc/ -B/build/target/bin/../x86_64-apple-darwin19/bin/ -B/build/target/bin/../x86_64-apple-darwin19/lib/ -isystem /build/target/bin/../x86_64-apple-darwin19/include -isystem /build/target/bin/../x86_64-apple-darwin19/sys-include    -g -O2 -O2  -g -O2 -DIN_GCC  -DCROSS_DIRECTORY_STRUCTURE  -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem ./include   -mmacosx-version-min=10.5 -pipe -fno-common -g -DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector   -mmacosx-version-min=10.5 -pipe -fno-common -I. -I. -I../.././gcc -I../../../libgcc -I../../../libgcc/. -I../../../libgcc/../gcc -I../../../libgcc/../include  -DHAVE_CC_TLS -DUSE_EMUTLS -o sse_savms64.o -MT sse_savms64.o -MD -MP -MF sse_savms64.dep -c -xassembler-with-cpp -include sse_savms64.vis ../../../libgcc/config/i386/sse_savms64.S
/build/target/bin/x86_64-apple-darwin19-ranlib: archive member: libgcc_eh.a(nality_v0) size too large (archive member extends past the end of the file)
make[2]: *** [Makefile:936: libgcov.a] Error 1
x86_64-apple-darwin19-ar: internal ranlib command failed
make[2]: *** Waiting for unfinished jobs....
make[2]: *** [Makefile:936: libgcc_eh.a] Error 1
libtool: link: (cd ".libs" && rm -f "libcp1plugin.so.0" && ln -s "libcp1plugin.so.0.0.0" "libcp1plugin.so.0")
libtool: link: (cd ".libs" && rm -f "libcp1plugin.so" && ln -s "libcp1plugin.so.0.0.0" "libcp1plugin.so")
libtool: link: ( cd ".libs" && rm -f "libcp1plugin.la" && ln -s "../libcp1plugin.la" "libcp1plugin.la" )
make[3]: Leaving directory '/build/build/gcc-9.2.0/build/libcc1'
make[2]: Leaving directory '/build/build/gcc-9.2.0/build/libcc1'
make[2]: Leaving directory '/build/build/gcc-9.2.0/build/x86_64-apple-darwin19/libgcc'
make[1]: *** [Makefile:12010: all-target-libgcc] Error 2
make[1]: Leaving directory '/build/build/gcc-9.2.0/build'
make: *** [Makefile:954: all] Error 2

exiting with abnormal exit code (2)
run 'OCDEBUG=1 ./build_gcc.sh' to enable debug messages

Happy to lodge this as another issue if required with reproduction steps, please let me know.

[tpoechtrager]

Yeah I already noticed. There is something wrong with the archiver (AR). I have to debug it.

[nightah]

No problems, I'll hang tight.

Let me know if there's anything I can help with, thanks again!

[tpoechtrager]

Found the cause and fixed it.

[nightah]

Perfect, so it looks like the only thing missing since your last fix is that you also need perl to compile GCC.